Win-both calculator
Two bets on different lines. See what you lose if one wins, and what you make if both do.
Free, no account needed. The link keeps your numbers, so you can share them.
Your two bets
Example numbers. Type your own.Market
Odds format
The lower line.
The higher line.
Optional: pick a sport for a rough chance that both bets win.
Result
Win-both bet
+$95.00if both win
Most of the time one bet wins and you lose $2.50.
One bet can lose. This is not a both-sides bet. The two lines are different, so most scores pay only one of the bets.
Both bets win if the total lands on 221, 222, 223 or 224.
- Bet on the Over-105
- $50.00
- Bet on the Under-105
- $50.00
- If one bet wins
- -$2.50
- If both bets win
- +$95.00
- Break-even rateHow often both must win to break even
- 2.56% (1 in 39)
How it works
- Pick a total or a spread, and decimal or American odds.
- Type both lines and their prices. For a total, the Over line is the lower one. For a spread, type each team's spread, like -2.5 and +3.5.
- The calculator splits your money so either single win pays back the same. Then it shows what one win costs and what two wins pay.
- The break-even rate is how often both bets must win to pay off. Pick a sport for a rough chance of that.
Sum = 1 / odds A + 1 / odds BAmount A = total x (1 / odds A) / sumIf one wins = total / sum - totalIf both win = 2 x total / sum - totalBreak-even = loss if one wins / (win if both + loss if one wins)Example
Over 220.5 and Under 224.5 at 1.95
- $100 in total: $50.00 on the Over and $50.00 on the Under.
- If one bet wins you lose $2.50. If the total lands on 221 to 224, both win and you make $95.00.
- Break-even: both must win 2.56% of the time, about 1 in 39.
These are the numbers already in the calculator above.
Questions
What is a win-both bet?
Two bets on one game at different lines, like Over 220.5 at one site and Under 224.5 at another. If the final score lands in between, both win. If not, one wins and you lose a little. It is also called a middle.
What is the break-even rate?
How often both bets have to win for this to break even over time. If the score lands in the gap more often than that, the bet is worth taking.
How is the chance worked out?
From a bell curve around the main line, with a typical spread of final scores for the sport, and extra weight on common NFL margins like 3 and 7. It is an estimate and says so. Lines far from the main line hit less often, so type the main line if you know it.
What happens on a whole-number line?
If the score lands exactly on a whole-number line, that bet pushes: you get its amount back, and the other bet wins. The calculator lists those scores.
Can I do this with player props?
Yes, the math is the same. There is no chance estimate for props, because their results don't follow one simple pattern.
Learn the idea
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